Add Point.origin for new Point(0.0, 0.0)

sky/sdk/lib/framework/components2/scaffold.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import '../fn2.dart';
 import '../rendering/box.dart';
 import '../rendering/object.dart';
 
 enum ScaffoldSlots {
   toolbar,
@@ skipping 72 matching lines @@
   static const kButtonX = -16.0; // from right edge of body
   static const kButtonY = -16.0; // from bottom edge of body
 
   void performLayout() {
     double bodyHeight = size.height;
     double bodyPosition = 0.0;
     if (_slots[ScaffoldSlots.toolbar] != null) {
       RenderBox toolbar = _slots[ScaffoldSlots.toolbar];
       toolbar.layout(new BoxConstraints.tight(new Size(size.width, kToolbarHeight)));
       assert(toolbar.parentData is BoxParentData);
-      toolbar.parentData.position = new Point(0.0, 0.0);
+      toolbar.parentData.position = Point.origin;
       bodyPosition = kToolbarHeight;
       bodyHeight -= kToolbarHeight;
     }
     if (_slots[ScaffoldSlots.statusBar] != null) {
       RenderBox statusbar = _slots[ScaffoldSlots.statusBar];
       statusbar.layout(new BoxConstraints.tight(new Size(size.width, kStatusbarHeight)));
       assert(statusbar.parentData is BoxParentData);
       statusbar.parentData.position = new Point(0.0, size.height - kStatusbarHeight);
       bodyHeight -= kStatusbarHeight;
     }
     if (_slots[ScaffoldSlots.body] != null) {
       RenderBox body = _slots[ScaffoldSlots.body];
       body.layout(new BoxConstraints.tight(new Size(size.width, bodyHeight)));
       assert(body.parentData is BoxParentData);
       body.parentData.position = new Point(0.0, bodyPosition);
     }
     if (_slots[ScaffoldSlots.drawer] != null) {
       RenderBox drawer = _slots[ScaffoldSlots.drawer];
       drawer.layout(new BoxConstraints(minWidth: 0.0, maxWidth: size.width, minHeight: size.height, maxHeight: size.height));
       assert(drawer.parentData is BoxParentData);
-      drawer.parentData.position = new Point(0.0, 0.0);
+      drawer.parentData.position = Point.origin;
     }
     if (_slots[ScaffoldSlots.floatingActionButton] != null) {
       RenderBox floatingActionButton = _slots[ScaffoldSlots.floatingActionButton];
       Size area = new Size(size.width + kButtonX, size.height + kButtonY);
       floatingActionButton.layout(new BoxConstraints.loose(area));
       assert(floatingActionButton.parentData is BoxParentData);
       floatingActionButton.parentData.position = (area - floatingActionButton.size).toPoint();
     }
   }
 
@@ skipping 78 matching lines @@
   void syncRenderObject(UINode old) {
     super.syncRenderObject(old);
     syncChild(toolbar, old is Scaffold ? old.toolbar : null, ScaffoldSlots.toolbar);
     syncChild(body, old is Scaffold ? old.body : null, ScaffoldSlots.body);
     syncChild(statusbar, old is Scaffold ? old.statusbar : null, ScaffoldSlots.statusBar);
     syncChild(drawer, old is Scaffold ? old.drawer : null, ScaffoldSlots.drawer);
     syncChild(floatingActionButton, old is Scaffold ? old.floatingActionButton : null, ScaffoldSlots.floatingActionButton);
   }
 
 }